5 ms·

I wish the article had discussed a few more details about this "rinse cycle", such as when exactly in the sleep cycle is it that this happens? REM?

toomuchtodo 7y ago
Non-REM. > By studying 11 people as they slept, Lewis and her team identified three parts to the rinse cycle. First, there is electrical activity that’s definitive of slow wave sleep. Then neurons “go quiet” as Lewis puts it, blood volume within the brain decreases, and cerebral spinal fluid flows upwards. This flow happens about every 20 seconds during slow wave sleep, according to the study. https://www.inverse.com/article/60583-sleep-rinse-cycle-alzheimer-s-toxins https://www.inverse.com/article/60583-sleep-rinse-cycle-alzh...
- kamranahmedse 7y ago
  The paragraph you linked doesn't conclude to Non-REM though
  - toomuchtodo 7y ago
    Slow wave sleep is non-REM [1]. Sorry, should've done the extra legwork and included that as part of the comment you replied to. [1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2824210/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2824210/
LinuxBender 7y ago
You can find some good discussions about this by Dr. Matthiew Walker on Youtube. He has done some talks at Google, with Joe Rogan and Dr. Rhonda Patrick.
collyw 7y ago
Deep sleep as far as I remember (from Mathew Walkers book). REM is more for dreams and sorting out emotions.
- waterhouse 7y ago
  You should probably check out "Matthew Walker's "Why We Sleep" Is Riddled with Scientific and Factual Errors": https://guzey.com/books/why-we-sleep/ https://guzey.com/books/why-we-sleep/
  - pengaru 7y ago
    If you're going to reference the criticism you should really include Walker's response as well: https://sleepdiplomat.wordpress.com/2019/12/19/why-we-sleep-responses-to-questions-from-readers/ https://sleepdiplomat.wordpress.com/2019/12/19/why-we-sleep-...
    - guzey 7y ago
      There's no connection between Walker and the post you linked. It's not clear why you believe it was written by Walker.
      - waterhouse 7y ago
        Well, the introductory section implies that the author (a) knows Walker's aim in his book, (b) receives direct emails about the book, (c) "very much appreciates" learning about errors in the book, and (d) knows what is planned in future editions of the book. The author's name is "sleepdiplomat"—it's odd that he doesn't explicitly give his name—but it turns out that (1) sleepdiplomat.com claims to be Matthew Walker's web site, and (2) @sleepdiplomat appears to be Walker's Twitter handle. Either someone has faked up an entire online presence for Walker, or the Wordpress post is indeed Walker himself. For those watching, there's also discussion of Walker's (alleged) response at Gelman's blog: https://statmodeling.stat.columbia.edu/2019/12/26/whassup-with-why-we-sleep/ https://statmodeling.stat.columbia.edu/2019/12/26/whassup-wi...
gentleman11 7y ago
More importantly, can naps trigger it?
- CodeCube 7y ago
  Fantastic question, which I suspect would have ramifications on the whole "uberman" sleep schedule
dzdt 7y ago
I would expect it to happen in the deepest sleep cycle with the lowest brain activity. I picture REM more as a testing environment run of higher level brain functions. Some things are stubbed out (voluntary muscle control and long term memory generation) but most brain activity is functioning like awakeness during REM.

toomuchtodo 7y ago

Non-REM. > By studying 11 people as they slept, Lewis and her team identified three parts to the rinse cycle. First, there is electrical activity that’s definitive of slow wave sleep. Then neurons “go quiet” as Lewis puts it, blood volume within the brain decreases, and cerebral spinal fluid flows upwards. This flow happens about every 20 seconds during slow wave sleep, according to the study. https://www.inverse.com/article/60583-sleep-rinse-cycle-alzheimer-s-toxins https://www.inverse.com/article/60583-sleep-rinse-cycle-alzh...

kamranahmedse 7y ago
The paragraph you linked doesn't conclude to Non-REM though
- toomuchtodo 7y ago
  Slow wave sleep is non-REM [1]. Sorry, should've done the extra legwork and included that as part of the comment you replied to. [1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2824210/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2824210/

LinuxBender 7y ago

You can find some good discussions about this by Dr. Matthiew Walker on Youtube. He has done some talks at Google, with Joe Rogan and Dr. Rhonda Patrick.

collyw 7y ago

Deep sleep as far as I remember (from Mathew Walkers book). REM is more for dreams and sorting out emotions.

waterhouse 7y ago
You should probably check out "Matthew Walker's "Why We Sleep" Is Riddled with Scientific and Factual Errors": https://guzey.com/books/why-we-sleep/ https://guzey.com/books/why-we-sleep/
- pengaru 7y ago
  If you're going to reference the criticism you should really include Walker's response as well: https://sleepdiplomat.wordpress.com/2019/12/19/why-we-sleep-responses-to-questions-from-readers/ https://sleepdiplomat.wordpress.com/2019/12/19/why-we-sleep-...
  - guzey 7y ago
    There's no connection between Walker and the post you linked. It's not clear why you believe it was written by Walker.
    - waterhouse 7y ago
      Well, the introductory section implies that the author (a) knows Walker's aim in his book, (b) receives direct emails about the book, (c) "very much appreciates" learning about errors in the book, and (d) knows what is planned in future editions of the book. The author's name is "sleepdiplomat"—it's odd that he doesn't explicitly give his name—but it turns out that (1) sleepdiplomat.com claims to be Matthew Walker's web site, and (2) @sleepdiplomat appears to be Walker's Twitter handle. Either someone has faked up an entire online presence for Walker, or the Wordpress post is indeed Walker himself. For those watching, there's also discussion of Walker's (alleged) response at Gelman's blog: https://statmodeling.stat.columbia.edu/2019/12/26/whassup-with-why-we-sleep/ https://statmodeling.stat.columbia.edu/2019/12/26/whassup-wi...

gentleman11 7y ago

More importantly, can naps trigger it?

CodeCube 7y ago
Fantastic question, which I suspect would have ramifications on the whole "uberman" sleep schedule

dzdt 7y ago

I would expect it to happen in the deepest sleep cycle with the lowest brain activity. I picture REM more as a testing environment run of higher level brain functions. Some things are stubbed out (voluntary muscle control and long term memory generation) but most brain activity is functioning like awakeness during REM.